Two-position three-way electromagnetic valve

Abstract

The utility model discloses a two-position three-way electromagnetic valve which comprises a valve seat, a valve head, a coil frame, a supporting frame, a supporting cover, a movable iron core, a static iron core and a coil. A rubber coating layer is fixedly installed on the side of the coil frame, an isolation cavity is formed between the rubber coating layer and the coil frame in a surrounding mode, and the coil is located in the isolation cavity and wound on the coil frame. The static iron core is clamped and fixed at the bottom in the coil rack, the movable iron core is arranged in the coil rack, and a reset spring is further arranged between the static iron core and the movable iron core; a plug is arranged in the cavity, and one end of the movable iron core is fixedly connected with the plug; according to the two-position three-way electromagnetic valve, the coil is isolated from external air through the isolation cavity defined by the rubber coating layer and the coil frame, external high temperature is prevented from being transmitted to the coil through the rubber coating layer, the coil is prevented from being damaged due to too high temperature, high-temperature steam can be isolated through the rubber coating layer, and the two-position three-way electromagnetic valve can be used in a high-temperature environment.

Description

Technical Field

[0001] The utility model relates to the field of electromagnetic valves, in particular to a two-position three-way electromagnetic valve. Background Art

[0002] Solenoid valve is an industrial equipment controlled by electromagnetics. It is an automatic basic component used to control fluids. It belongs to an actuator and is not limited to hydraulic and pneumatic. It is used in industrial control systems to adjust the direction, flow, speed and other parameters of the medium. Solenoid valves can be used with different circuits to achieve the desired control, and the accuracy and flexibility of the control can be guaranteed. Among them, the existing two-position three-way solenoid valve is controlled by a single coil or a double coil. The valve body is opened or closed after the coil is instantly energized. However, the existing solenoid valve products rarely have a special coil protection process. The coil is simply fixed by simply wrapping masking glue, or the coil is glued together by high-temperature glue. This treatment also destroys the coating of the coil, causing the coil to short-circuit and damage; the existing product coil is directly exposed to the outside, so that the solenoid valve is in a high temperature or humid or severely corrosive environment. It is easy for the solenoid valve to quickly absorb heat and heat up, causing the coil temperature to be too high and damaged, or water vapor enters the coil to cause a short circuit and damage, or the copper wire is corroded and causes a short circuit and old damage. Utility Model Content

[0003] In view of this, the purpose of the utility model is to provide a two-position three-way solenoid valve for solving the above problems.

[0004] In order to solve the above technical problems, the technical solution of the utility model is: a two-position three-way solenoid valve, including a valve seat, a valve head, a coil frame, a support frame, a support cover, a moving iron core, a static iron core and a coil; the valve seat is fixedly installed on one side of the valve head, the interior of the valve seat is hollow, a cavity is opened inside the valve head and is connected to the valve seat, a first air pipe head and a second air pipe head are arranged on the valve head, the first air pipe head and the second air pipe head are both connected to the cavity, a third air pipe head is arranged on the valve seat, and the third air pipe head is connected to the interior of the valve seat; the support cover is fixedly installed on the bottom of the valve seat, and the coil frame is fixedly installed on the The coil frame is provided with a rubber coating layer fixedly mounted on the side of the coil frame, and an isolation cavity is formed between the rubber coating layer and the coil frame, and the coil is located in the isolation cavity and is wound on the coil frame; the interior of the coil frame is hollow and connected with the interior of the valve seat, the static iron core is clamped and fixed on the inner bottom of the coil frame, the moving iron core is arranged inside the coil frame, and a reset spring is also arranged between the static iron core and the moving iron core; a plug is arranged in the cavity, and one end of the moving iron core passes through the interior of the valve seat and extends to the cavity of the valve head and is fixedly connected to the plug.

[0005] Preferably, a first sealing ring is provided between the valve head and the valve seat, a second sealing ring is provided between the valve seat and the support cover, and a third sealing ring is provided between the static iron core and the inside of the coil frame.

[0006] Preferably, the valve seat and the valve head are provided with a plurality of corresponding fixing holes, the support cover is provided with threaded holes corresponding to the positions of the fixing holes, fixing screws are arranged in the fixing holes, and the valve seat and the valve head are screwed into the threaded holes by the fixing screws, thereby achieving simultaneous fixation of the valve seat, the valve head and the support cover.

[0007] Preferably, a plurality of flanges are provided on the coil frame, the flanges are in contact with the rubber coating layer, and limiting grooves are provided on the flanges for limiting and fixing the rubber coating layer.

[0008] Preferably, a groove is formed at one end of the moving iron core close to the static iron core, and the return spring is arranged in the groove.

[0009] Preferably, the coil frame is recessed inwardly to form a wiring seat, and an electrode sheet electrically connected to the coil is fixedly mounted on the wiring seat.

[0010] Preferably, the rubber coating layer comprises one of ABS, PC, PA and PBT.

[0011] Preferably, the moving iron core and the coil always have an overlapping portion in the radial direction.

[0012] The technical effects of the utility model are mainly reflected in: the coil is isolated from the external air by the isolation cavity surrounded by the rubber layer and the coil frame, and the rubber layer is used to block the external high temperature from being transmitted to the coil, so as to avoid the coil being damaged due to excessive temperature. The rubber layer can also be used to isolate high-temperature water vapor, so that the two-position three-way solenoid valve can be used in high-temperature environment or water vapor environment; the moving iron core is pushed by the reset spring, so that the plug moves toward the second air pipe head and closes the second air pipe head, so that the first air pipe head is connected to the third air pipe head; the magnetic field is generated by energizing the coil, so that the moving iron core is adsorbed on the static iron core, so that the plug moves toward the third air pipe head and closes the third air pipe head, so that the first air pipe head is connected to the third air pipe head, thereby realizing the switching of the air path. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a three-dimensional diagram of the utility model;

[0014] Figure 2 It is a top view of the utility model;

[0015] Figure 3 for Figure 2Sectional view along line AA;

[0016] Figure 4 This is an exploded view of the valve head, valve seat and support cover.

[0017] The accompanying drawings are marked as: 1-valve seat, 11-first air pipe head, 12-second air pipe head, 13-second sealing ring, 14-fixing hole, 15-fixing screw, 2-valve head, 21-third air pipe head, 22-first sealing ring, 3-coil frame, 31-coil, 32-terminal seat, 33-electrode sheet, 4-support frame, 5-support cover, 51-threaded hole, 52-flange, 53-limiting groove, 6-moving iron core, 61-plug, 62-groove, 7-static iron core, 71-third sealing ring, 8-rubber coating, 9-reset spring. DETAILED DESCRIPTION

[0018] The specific implementation modes of the present invention are further described below in conjunction with the accompanying drawings to make the technical solutions of the present invention easier to understand and grasp.

[0019] In this embodiment, it should be understood that the terms "middle", "upper", "lower", "top", "right", "left end", "above", "back", "middle", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0020] In addition, in this specific embodiment, if the connection or fixing method between components is not specifically described, the connection or fixing method can be through bolt fixing or pin fixing, or pin shaft connection and the like commonly used in the prior art, and therefore, it will not be described in detail in this embodiment.

[0021] The utility model provides a two-position three-way solenoid valve, as shown in the figure, comprising a valve seat 1, a valve head 2, a coil 31 frame 3, a support frame 4, a support cover 5, a moving iron core 6, a static iron core 7 and a coil 31; the valve seat 1 is fixedly mounted on one side of the valve head 2, the interior of the valve seat 1 is hollow, a cavity is provided inside the valve head 2 and is communicated with the valve seat 1, a first air pipe head 11 and a second air pipe head 12 are provided on the valve head 2, the first air pipe head and the second air pipe head 12 are both communicated with the cavity, a third air pipe head 21 is provided on the valve seat 1, and the The third trachea head 21 is connected to the interior of the valve seat 1; the support cover 5 is fixedly mounted on the bottom of the valve seat 1, and the coil 31 frame 3 is fixedly mounted on the support cover 5 and extends toward the valve seat 1 and enters the interior of the valve seat 1; a rubber coating layer 8 is fixedly mounted on the side of the coil 31 frame 3, and an isolation cavity is formed between the rubber coating layer 8 and the coil 31 frame 3, and the coil 31 is located in the isolation cavity and is wound on the coil 31 frame 3. The isolation cavity formed by the rubber coating layer 8 and the coil 31 frame 3 makes the coil 31 and the outside The air is isolated, and the rubber coating 8 is used to block the external high temperature from being transferred to the coil 31, so as to prevent the coil 31 from being damaged due to excessive temperature. The rubber coating 8 can also be used to isolate high-temperature water vapor, so that the two-position three-way solenoid valve can be used in a high-temperature environment; the interior of the coil 31 frame 3 is hollow and connected to the interior of the valve seat 1, the static iron core 7 is clamped and fixed to the inner bottom of the coil 31 frame 3, the moving iron core 6 is arranged inside the coil 31 frame 3, and a reset spring 9 is also arranged between the static iron core 7 and the moving iron core 6; a plug 6 is arranged in the cavity 1, one end of the moving iron core 6 passes through the interior of the valve seat 1 and extends to the cavity of the valve head 2 and is fixedly connected to the plug 61, and the moving iron core 6 is pushed by the return spring 9, so that the plug 61 moves toward the second air pipe head 12 and closes the second air pipe head 12, so that the first air pipe head 11 is connected to the third air pipe head 21; the coil 31 is energized to generate a magnetic field, so that the moving iron core 6 is adsorbed on the static iron core 7, so that the plug 61 moves toward the third air pipe head 21 and closes the third air pipe head 21, so that the first air pipe head 11 is connected to the third air pipe head 21.

[0022] Preferably, a first sealing ring 22 is provided between the valve head 2 and the valve seat 1, a second sealing ring 13 is provided between the valve seat 1 and the support cover 5, and a third sealing ring 71 is provided between the static iron core 7 and the inside of the coil 31 frame 3. Through the coordinated cooperation of the first sealing ring 22, the second sealing ring 13 and the third sealing ring 71, gas leakage from the valve seat 1, the valve head 2 and the coil 31 frame 3 to the outside is avoided.

[0023] Preferably, the valve seat 1 and the valve head 2 are provided with a plurality of corresponding fixing holes 14, the support cover 5 is provided with threaded holes 51 corresponding to the positions of the fixing holes 14, and the fixing holes 14 are provided with fixing screws 15. The valve seat 1 and the valve head 2 are screwed into the threaded holes 51 by the fixing screws 15, so that the valve seat 1, the valve head 2 and the support cover 5 are fixed at the same time, which not only improves the assembly efficiency but also facilitates the disassembly and maintenance or replacement of the sealing ring.

[0024] Preferably, a plurality of flanges 52 are provided on the coil frame 31, the flanges 52 are in contact with the rubber coating 8, and a limiting groove 53 is provided on the flange 52 for limiting and fixing the rubber coating 8. The flanges 52 limit the coil 31 and increase the contact area between the coil frame 31 and the rubber coating 8, so that the rubber coating 8 is fixed more firmly and loosened.

[0025] Preferably, a groove 62 is provided at one end of the moving iron core 6 close to the static iron core 7, and the return spring 9 is arranged in the groove 62 to shorten the distance between the moving iron core 6 and the static iron core 7, so that after the coil 31 generates a magnetic field, the magnetic attraction between the static iron core 7 and the moving iron core 6 is greater.

[0026] Preferably, the coil 31 frame 3 is recessed inwardly to form a wiring seat 32 , and an electrode sheet 33 electrically connected to the coil 31 is fixedly mounted on the wiring seat 32 , and is electrically connected to an external control circuit via the electrode sheet 33 .

[0027] Preferably, the rubber coating layer 8 includes one of ABS, PC, PA and PBT.

[0028] Preferably, the moving iron core 6 and the coil 31 always have an overlapping portion in the radial direction, so that after the coil 31 generates a magnetic field, a larger portion of the moving iron core 6 is within the magnetic field.

[0029] The technical effects of the utility model are mainly reflected in: the coil is isolated from the external air by the isolation cavity surrounded by the rubber layer and the coil frame, and the rubber layer is used to block the external high temperature from being transmitted to the coil, so as to avoid the coil being damaged due to excessive temperature. The rubber layer can also be used to isolate high-temperature water vapor, so that the two-position three-way solenoid valve can be used in high-temperature environment or water vapor environment; the moving iron core is pushed by the reset spring, so that the plug moves toward the second air pipe head and closes the second air pipe head, so that the first air pipe head is connected to the third air pipe head; the magnetic field is generated by energizing the coil, so that the moving iron core is adsorbed on the static iron core, so that the plug moves toward the third air pipe head and closes the third air pipe head, so that the first air pipe head is connected to the third air pipe head, thereby realizing the switching of the air path.

[0030] Of course, the above are only typical examples of the present invention. In addition, the present invention may have many other specific implementation methods. Any technical solutions formed by equivalent replacement or equivalent transformation fall within the scope of protection required by the present invention.

Claims

1. A two-position three-way solenoid valve, characterized in that: It includes a valve seat, a valve head, a coil frame, a support frame, a support cover, a moving iron core, a static iron core and a coil; the valve seat is fixedly installed on one side of the valve head, the interior of the valve seat is hollow, a cavity is opened inside the valve head and is connected to the valve seat, a first air pipe head and a second air pipe head are arranged on the valve head, the first air pipe head and the second air pipe head are both connected to the cavity, a third air pipe head is arranged on the valve seat, and the third air pipe head is connected to the interior of the valve seat; the support cover is fixedly installed on the bottom of the valve seat, the coil frame is fixedly installed on the support cover and extends toward the valve seat and moves into the interior of the valve seat; a rubber coating layer is fixedly installed on the side of the coil frame, and an isolation cavity is formed between the rubber coating layer and the coil frame, and the coil is located in the isolation cavity and is wound on the coil frame; the interior of the coil frame is hollow and connected with the interior of the valve seat, the static iron core is clamped and fixed to the inner bottom of the coil frame, the moving iron core is arranged inside the coil frame, and a reset spring is also arranged between the static iron core and the moving iron core; a plug is arranged in the cavity, and one end of the moving iron core passes through the interior of the valve seat and extends to the cavity of the valve head and is fixedly connected to the plug.

2. A two-position three-way solenoid valve as claimed in claim 1, characterized in that: A first sealing ring is arranged between the valve head and the valve seat, a second sealing ring is arranged between the valve seat and the support cover, and a third sealing ring is arranged between the static iron core and the inside of the coil frame.

3. A two-position three-way solenoid valve as claimed in claim 1, characterized in that: The valve seat and the valve head are provided with a plurality of corresponding fixing holes, the support cover is provided with threaded holes corresponding to the positions of the fixing holes, fixing screws are arranged in the fixing holes, and the valve seat and the valve head are screwed into the threaded holes by the fixing screws, so as to achieve simultaneous fixation of the valve seat, the valve head and the support cover.

4. A two-position three-way solenoid valve as claimed in claim 1, characterized in that: The coil frame is provided with a plurality of flanges, the flanges are in contact with the rubber coating layer, and the flanges are provided with limiting grooves for limiting and fixing the rubber coating layer.

5. A two-position three-way solenoid valve as claimed in claim 1, characterized in that: A groove is formed at one end of the moving iron core close to the static iron core, and the return spring is arranged in the groove.

6. A two-position three-way solenoid valve as claimed in claim 1, characterized in that: The coil frame is recessed inwardly to form a wiring seat, and an electrode sheet electrically connected to the coil is fixedly mounted on the wiring seat.

7. A two-position three-way solenoid valve as claimed in claim 1, characterized in that: The rubber layer includes one of ABS, PC, PA and PBT.

8. A two-position three-way solenoid valve as claimed in claim 1, characterized in that: The moving iron core and the coil always have an overlapping portion in the radial direction.

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